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| Titel |
Using high-resolution phosphorus data to investigate mitigation measures in headwater river catchments |
| VerfasserIn |
J. M. Campbell, P. Jordan, J. Arnscheidt |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 1 ; Nr. 19, no. 1 (2015-01-26), S.453-464 |
| Datensatznummer |
250120603
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| Publikation (Nr.) |
 copernicus.org/hess-19-453-2015.pdf |
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| Zusammenfassung |
| This study reports the use of high-resolution water quality monitoring to
assess the influence of changes in land use management on total phosphorus
(TP) transfers in two 5 km2 agricultural sub-catchments. Specifically,
the work investigates the issue of agricultural soil P management and
subsequent diffuse transfers at high river flows over a 5-year timescale.
The work also investigates the phenomenon of low flow P pollution from
septic tank systems (STSs) and mitigation efforts – a key concern for
catchment management. Results showed an inconsistent response to soil P
management over 5 years with one catchment showing a convergence to
optimum P concentrations and the other an overall increase. Both catchments
indicated an overall increase in P concentration in defined high flow
ranges. Low flow P concentration showed little change or higher P
concentrations in defined low flow ranges despite replacement of defective
systems and this is possibly due to a number of confounding reasons
including increased housing densities due to new-builds. The work indicates
fractured responses to catchment management advice and mitigation and that
the short to medium term may be an insufficient time to expect the full
implementation of policies (here defined as convergence to optimum soil P
concentration and mitigation of STSs) and also to gauge their effectiveness. |
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